If a 100-pound person played tug of war with a 50-pound dog , how light difference forces affect the results?

Answer: APPARENTLY YOU CAN battle a lion at the San Antonio Zoo. OK, it's not that kind of battle—it's a tug of war battle. There is a thick rope passing through a hole. On one end, there is a lion cub. On the other end of the rope there could be three professional WWE wrestlers. Who wins? Well, the wrestlers don't win. But there is also some physics here.

It's all about friction

A typical tug of war isn't really about strength—it's about friction. It doesn't matter how strong you are if you don't have enough friction to keep yourself from sliding. Let me show you. Here is a force diagram for two people in a tug of war.

Each puller (person pulling on the rope) has essentially four forces acting on them. There is the downward weight which is balanced by the upward push of the ground. Since the person pulls on the rope, the rope pulls on the person in the opposite direction (this because of the two-ended nature of forces). Finally, there is the frictional force between the person and the ground. If no one is "winning," all these forces add up to zero and the person stays at rest. In order to start moving in the winning direction, the frictional force must be greater than the force from the rope.

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This "two-ended" nature of forces means that forces come in pairs and are an interaction between two objects. It doesn't matter how hard the person on the left pulls on the rope, this same rope pulls on that person. So if you were to increase your pull to 1,000 Newtons—that same rope pulls on both people. So the key is the other force acting in the horizontal direction: friction.

The maximum frictional force depends on two things. It depends on the types of surfaces interacting (maybe it's the rubber on a shoe interacting with a concrete floor) where some surfaces just have more friction than others. You really can't change this part in a tug of war. The friction force also depends on the normal force. The normal force is the force with which the two surfaces are pushed together. In the case of this simple tug of war above, the ground pushes up with a force equal to the gravitational weight of the person. This means that heavier people will have a greater frictional force acting to help win a tug of war.

Oh, note that in the human vs. lion tug of war the humans are on a different surface than the lion. Who has the advantage? It's probably the lion since she could have uneven ground that would allow her to use more than just plain old sliding friction.

So, it's really about mass

If you have two contestants on equal ground with similar friction materials, mass matters. If the person on the left has half the mass of the person on the right, they will have half the friction. This means that it's pretty tough to beat a heavier puller.

What about the lion? This looks like a young lion—she could have a mass of about 120 kg (up to maybe 182 kg). A typical massive human wrestler might have a mass of around 90 to 100 kg. Three humans will probably have more mass than a single female lion. Probably. The humans should have an advantage in the mass.

It's also about rope friction

Wait! This isn't a normal tug of war. The rope isn't straight. Did you notice that? This can make a big difference in that it can add another frictional force into play. Let me show you how this works with a diagram of the rope as seen from the top where it passes through the glass.

Explanation:

Which of the following statements for artificial selection are true?

A).Artificial selection is the intentional breeding of organisms for desirable traits
B).Artificial selection can only be seen in animals
C).Artificial selection is the breeding of plants and animals without interference
D).Artificial selection can only be seen in plants

I NEED THIS NOW!! No links

What does it mean when a substance sinks in water?

It is malleable.

It is not soluble.

Its density is less than water's density.

Its density is greater than water's density.

The bacteria lactobacillus acidophilus are frequently used in the production of yogurt. there

BIOLOGY PLS HELP AND BE HONEST!!
If a large seed that was once prominent on an island became scarce and there were more small seeds available, how would this affect the relative fitness and what type of selection would this lead to?


a

Individuals at both the upper and lower ends of the curve will have higher fitness than individuals near the middle.

b

Individuals near the center of the curve will have higher fitness than individuals at either end.

c

Individuals at one end of the curve will have a higher fitness than individuals elsewhere in the curve.

d

The individuals in the curve would remain unchanged.

Which of these is an example of ACTIVE immunity?
A.) A baby receiving breast milk from a well vaccinated adult with a strong immune system.
B.) A person receiving a Hepatitis B vaccine prior to entering the healthcare field.
C.) A person receiving a tetanus shot after cutting themselves on a rusty metal nail.
D.) A person receiving an antivenom after a snake bite.

What is the history of Gene Therapy?

Which scenario describes the damage caused by a tornado? a flooded city on the coast with trees damaged by high winds a section of forest with trees that are burned or split in half a beach that has been severely damaged because of storm surge a path of destruction up to 50 miles long with destroyed trees and homes

Which of the following distinguishes the outer limits of a standard growing season?


necessary GDD total

average upper temperature

first and last frost dates

locations by latitude and longitude

7 POINTS FOR EACH ANSWER and brainliest good at science? then step right up to this mind-boggling question!!
The power of imagination helps a scientist to
A. propose valid scientific explanations about the solar system
B. use biased methods to answer questions about the solar system
C. pose questions about the solar system which are not reasonable
D. create theories about the solar system which are not acceptable

PLEASE HELP ME!!!!!!!!!!!!!

Mention the three types of collisions involved in convergent boundaries.

please help!!!!!!!!!!!!

What 3 structures do plant cells have that animal cells do not have?

What happens to the digested food? The small intestine absorbs most of the nutrients in your food, and your circulatory system passes them on to other parts of your body to store or use. Special cells help absorbed nutrients cross the intestinal lining into your bloodstream.

All animals share the following characteristic a. being a consumer, b having cell walls, c not having cell nuclei, d budding, Please include an explanation I just completed a test but I don't understand and when I looked for the question on brainly it had 2 answers disagreeing

what is respiration
​

Which of the following statements is correct? (choose one)



A.) All cells have the same genes, but different genes are active in different cells. All cells have the same genes, but different genes are active in different cells.


B.) All cells have the same genes, and all of a cell's genes are active at the same time.

I will give brain to the correct answer!

Which statement best explains how sewage systems help fight the spread of disease?

A. They carry antibiotics that kill pathogens

B. They carry human waste to treatment facilities away from cities

C. They kill animals that spread pathogenic bacteria

D. They add chlorine to drinking water before it is transported to homes.​

Help due soon I’ll give brainliest

Over half of the people in Cape Canaveral, Florida are
over the age of fifty. How is
this related to Florida's role in space research?
A)
The Kennedy Space Center only hires people who are over fifty years old.
B)
The Cape Canaveral communities offer free medical care for senior citizens.
Cape Canaveral has laws only allowing senior citizens to live in the
community
An entire generation of space-industry workers retired in the Space Coast
area.
D)

Nitrogen is present in the environment in chemical forms like

A) Organic nitrogen - containing compounds
B) Ammonium ions
C) Nitrate
D) All of the above

NEED HELP ASAP BIOLOGY 20 POINTS

Which measurement unit represents volume?

Manish is growing crop of Bengal gram and he did not add any nitrogen fertilizers to the soil. Would he get a better yield? How would the plants cope up with their nitrogen requirements?

Mountain building happens as a result of –

Question 3 options:

Two continental plates converging


Two oceanic plates converging


Two continental plates transforming

are these correct? or no?

thoughts about climate change ???

In a food chain, consumers gather energy by _______. Can someone plz help

a.

consuming organisms at a lower trophic level

b.

consuming organisms at a higher trophic level

c.

decomposing dead organic matter

d.

absorbing sunlight directly

1Which waste needs to be sorted and which can be disposed of in the general bin? 2How do you know which wastes can be recycled and sorted? 3Provide arguments to show that we save energy by making items from recycled materials.​

Which of the following describes a scenario that would result in the phenotypic change shown in the graph?

A) A fish that has mouth parts adapted to eat moderately sized prey is introduced into a lake in which there are only large and small prey.

B) A population of mice live on the ground and in short trees. An invasive, tree-dwelling snake that preys on the mice is introduced into the area.

C) Climate change-induced warming of arctic tundra reduces average snow cover that lighter-colored arctic
foxes rely on for camouflage. Darker-colored arctic foxes are better suited to the exposed moss and grass habitat.

D) House sparrows that lay smaller-than-average clutches of eggs produce fewer viable offspring, while larger-than-average clutches of eggs result in malnourished chicks that have a higher mortality.

Describe the mutation that confers resistance to infection to a major strain of HIV.